On Mar 13, 1:17*am, wrote:
WTC Towers: The Case For Controlled Demolition
By Herman Schoenfeld

In this article we show that "top-down" controlled demolition
accurately accounts for the collapse times of the World Trade Center
towers. A top-down controlled demolition can be simply characterized
as a "pancake collapse" of a building missing its support columns.
This demolition profile requires that the support columns holding a
floor be destroyed just before that floor is collided with by the
upper falling masses. The net effect is a pancake-style collapse at
near free fall speed.


snip

You are in the wrong newsgroup. Take it to alt.conspiracy. Prepare
to be laughed at.

For a CD you have to explain how months of work, entire crews, walls
and coverings stripped out, charges placed, miles of fuse cord, etc.
were not noticed by the people working there. You might also find at
least one expert on CD that will agree that it is a sane proposition
to do a CD by starting at the top.

BTW the true times of the collapse are right at 16 seconds IIRC.

Harry K